(1 中州大学工程技术学院，郑州 450044；2 郑州大学新型建材与结构研究中心，郑州 450002；3 中交第二航务工程勘察设计院有限公司， 武汉 430000；4 中交第一公路工程局桥隧工程有限公司，保定074000)

［摘要］为了更好地研究由外层GFRP管、内层钢管及夹层混凝土三部分组成的GFRP-凝土-钢管组合方柱的轴压性能，进行了10个具有不同空心率的GFRP约束混凝土方柱的轴压试验，包括GFRP-混凝土-钢管组合方柱、GFRP约束混凝土实心方柱及GFRP约束混凝土空心方柱。主要研究参数有截面配置、空心率、外层GFRP层数。试验结果表明：内部空心明显降低了外层GFRP约束的效果及整体性能，但这种缺失完全可以通过内部设置适宜的钢管得到补偿；GFRP-混凝土-钢管组合方柱中的混凝土被内层钢管、外层GFRP很好地约束，柱的强度和延性均得到明显提高，且其轴向压应力-应变行为非常相似于相应GFRP约束混凝土实心方柱。

［关键词］GFRP; 组合柱; 方形截面; 轴向受压

中图分类号：TU398.9        文献标识码：A       文章编号：1002-848X(2014)15-0057-04

Study on axial compression performance of GFRP-concrete-steel tube combined square columns

Wang Dai1,2, Wang Yongzhi1, Duan Xiangpan3, Lei Qingrong4

 (1 College of Engineering Technology, Zhongzhou University, Zhengzhou 450044, China; 2 Research Center for New Construction Material and Structure, Zhengzhou University, Zhengzhou 450002, China; 3 CCCC Second Harbor Consultants Co., Ltd., Wuhan 430000, China; 4 Bridge and Tunnel Engineering Co., Ltd. of CCCC First Highway Engineering Co., Ltd., Baoding 074000, China)

Abstract: In order to study the axial compression performance of GFRP-concrete-steel tube combined square columns composed of GFRP tube outside, steel tube inside and concrete  between them, axial compression experiments of 10 GFRP-confined concrete square columns with different hollow ratios were carried out, including GFRP-concrete-steel tube combined square columns, GFRP confined concrete solid square columns and GFRP confined concrete hollow square columns. The main parameters studied included the section configuration, the hollow ratio and the thickness of the GFRP outside. Test results show that inner hollow reduces the effect of external GFRP confinement and the overall performance, but this loss of confinement effectiveness and the overall performance can almost be completely compensated through setting a suitable steel tube in the column. The concrete in GFRP-concrete-steel tube combined square columns is very effectively confined by steel tube inside and GFRP tube outside, and the  strength of the GFRP-concrete-steel tube combined square columns is improved obviously  as well as the ductility. The axial stress-strain behavior of GFRP-concrete-steel tube combined square columns is very similar to that of GFRP confined solid square columns.

Keywords: galss fiber reinforced polymer(GFRP); combined column; square section; axial compression

* 郑州市科技攻关项目（112PPTGY251-6）。

作者简介：王代，博士，讲师，Email：987453942@qq.com。

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